Egbert a



(No Model.)

R. A BAUUN.

LIGHT REGULATOR.

Patented Mar. 9, 1886.

N, Prrzns, Phm-umgmpher. washington n. c4

rares Ntra LIGHT-REGULATOR.

SPECF-ICATON forming part oi' Letters Patent No. 337,548, dated March 9, 1886.

' Application tiled December 26, 1855. Serial No. 186,686. (No model.)

To @ZZ whom, t may concern;

Be it known that I, ROBERT A. BACON, a citizen of the Dominion of Canada, now residing at New York, in the county and tate of New York, have invented certain new and useful Improvements in Light-Regulators. of which the following is a specification, reference being had therein to the accompanying drawings, in which- Figure l represents a vert-ical central section of my regulator applied to an incandescent light in an open position. Fig. 2 represents the same closed. Figs. 3, 4, and 5 represent horizontal sections on the line x x, with the regulator in different positions.

This invention is designed to provide lamps, and more particularly electric lamps, with means for regulating the amount of light emitted from the same, whereby a room provided with such light may have the full ehcect thereof, or the same may be reduced to any desired degree, or temporarily cut off from the room, if desired, while the lamp is in its full eiulgence within the regulator.

The invention consists in the peculiar combination andthe construction and arrangement of parts hereinafter described and claimed.

Referring by letter to the drawings, A represents the lamp, which may be of any approved form and is provided with a disk, B, attached to the metal part of the lamp, and having a depending ange, b. Attached to this liange is a perforated cylinder, C, provided with spring-catches D, which secure the cylinder to the disk B. Around this tube is a second perforated tube, E, so arranged that it may be easily moved around or up and down the same to a limited extent.

The mode of using this device is as follows: Should a small light be desired, the regulator is attached to the lainpby pushing it against the disk, when the spring-catches D fall backward and allow the inner tube to pass upward sufficiently' high to permit the catches to return to their normal position and rest on the top of the disk, whereby the regulator is iirmly attached to the lamp. \Vith the perforation arrangedin the manner shownin Figs. l and 3, the light would be considerably lesscned; but if it is desired to almost entirely shut off the light, then the regulator is turned in the position shown in Fig. ,4, in which pothis construction it is evident that any desired amount of light may be had, from the full amount the lamp is capable of giving down t0 the merest glimmer, and that thelight maybe entirely cut off from the room, if desired, without extinguishing the lamp.

I prefer to make the out-er tube with a portion of the perforation rather larger than the other, as shown at c in Figs. 3, 4, and 5, so that when the tube is set as shown in Figs. 2 and 4, to diminish thelight, less light may be given in one part of the room than in other portions.

When the regulator is arranged as in Fig-1, the light is entirely cut off in one direction, while a moderate amount of light is allowed to be given out to the other parts of the room. This will he found very convenient for sickrooms or for persons having eyes that cannot bear the light striking directly upon them.

My invention will also be f'ound very useful in theaters or similar places where a variable or subdued light is required, as with my regulater a stronger light may be thrown upon one point on the stage or upon one character while the others may be kept in a subdued light, or the entire stagenmay be kept in a subdued light, at will.

I am aware of the Patents Nos. 128,153 and 197.578, for lanterns with slides adapted to entirely or partially cover the light within the lantern, and make no claim to anything shown therein, as I consider my device as essentially different from anything shown in those patents.

What I claim as new isl. The combination, with a lamp, of a removable light-regulator surrounding the light, consisting of two concentric tubes, each of said tubes. having a series of perforations correspending and substantially registering with those in the other, and one of them movable with relation to the other to regulate the amount oflight passing through the regulator, substantially as described.

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2. The combination, with alztmp, of two ooncenti'ie tubes surrounding the light thereof, eaeh of said tubes having a series of perfomtions coi-responding and substantially regis tering with those in theother, and one of them being movable with relation to the other and provided with openings of larger clia-lnetei att one portion than the other, whereby the iight may be distributed unequally in the iooin l l l lighted by said lamp, substantially as de- Io scribed.

In testimony whereof I affix my signature, inpiesenee of' two Witnesses, this 22d day of Deeenibei', 1885.

' ROBERT A. BACON.

NVitnesses:

MICHAEL I-I. GARDozo, ANDREW E. CoLyIN. 

